OP I had a Smith M&P15 that was a fantastic carbine, it never let me down. Only reason I sold it to was to fund my disease. I think a Smith Sport would be a solid performer. Windham seems to be getting good reviews by people but I personally have zero experience with them. What is your budget?

If you are around 850-900 take my advice and buy as much rifle as you can in the beginning. I did the buying 4 AR's/uppers before finally buying a BCM and getting what I wanted in the first place. You will actually save money if you get the most out of your money with your first purchase.